When I select and define client count in the multicast to 3 for example, each client now DOES give me the "press enter to start" until it reaches the 3 threshold, and then it starts, The 3 clients start out very fast, then eventually crawl to a complete standstill (58.1%) and sit there for hours. Any ideas on things to try. Unicast works on the same machines at 10+ Gig/minute.

I still cannot get it to work when leaving the client count blank (none of them say "press a key to start")